属于腹膜后隙内的器官是()。
A.肾
B.十二指肠
C.胰
D.脾
E.直肠
参考答案:A
婴幼儿开始社会性微笑的时间:()
A.初生
B.5~6周
C.2个月
D.3~4个月
E.1岁
Children should be encouraged to try new things but should not be too hard.
A.drawn
B.stroke
C.rushed
D.pushed